The level slider controls the amount of recursion used in the drawing,
The length slider controls the overall size of the drawing.
Use the draw button to draw the curve in black, use the drawColor button to draw the curve with eash segment draw in a different color. This helps follow the recursion used in the drawing.
The clean button will erase the screen. The stopall button will stop the drawing procedure.
Some of the information used to create this project was obtained from a web page'Sierpinski Curves', by Eric Gossett at Bethel College. (His page is no longer available).
Code to draw the curve is also available in MSWLogo. Write me and I'll send it to you.